I’d like to see how many trains are operating on a line by looking at the colored circles at right. A full circle would mean one train; a circle split into halves vertically, two trains; into thirds= three trains…

This is something that we’d love to add, especially in a way that doesn’t cause new players any more anxiety. I like the idea about packing a bit more information into the discs, but we’d need to make sure it didn’t confuse people too much before they figured it out.